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function GetSqrDistancePoints takes real x1, real y1, real x2, real y2 returns real
    return (x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2)
endfunction

function GetDistancePoints takes real x1, real y1, real x2, real y2 returns real
    return SquareRoot((x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2))
endfunction

function GetSqrDistanceWidgetPoint takes widget w, real x, real y returns real
    local real dx = GetWidgetX(w) - x
    local real dy = GetWidgetY(w) - y
    return dx * dx + dy * dy
endfunction

function GetDistanceWidgetPoint takes widget w, real x, real y returns real
    return SquareRoot(GetSqrDistanceWidgetPoint(w, x, y))
endfunction

function GetSqrDistanceWidgets takes widget w1, widget w2 returns real
    local real dx = GetWidgetX(w1) - GetWidgetX(w2)
    local real dy = GetWidgetY(w1) - GetWidgetY(w2)
    return dx * dx + dy * dy
endfunction

function GetDistanceWidgets takes widget w1, widget w2 returns real
    return SquareRoot(GetSqrDistanceWidgets(w1, w2))
endfunction